US4142182A - Procedure for addressing of visual display devices - Google Patents

Procedure for addressing of visual display devices Download PDF

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Publication number
US4142182A
US4142182A US05/769,322 US76932277A US4142182A US 4142182 A US4142182 A US 4142182A US 76932277 A US76932277 A US 76932277A US 4142182 A US4142182 A US 4142182A
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United States
Prior art keywords
elements
display
matrix
address
character
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Expired - Lifetime
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US05/769,322
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English (en)
Inventor
Allan R. Kmetz
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BBC Brown Boveri AG Switzerland
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BBC Brown Boveri AG Switzerland
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/16—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source
    • G09G3/18—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source using liquid crystals

Definitions

  • This invention relates to a system for addressing visual display devices.
  • the number of connections and drivers can be reduced if one interconnects the display elements as a matrix and applies time-multiplexed addressing.
  • Such an interconnection method is known and is illustrated schematically in FIG. 1.
  • the display elements 1-2 are here considered to be "segments" of a nematic liquid crystal display device, but the invention is not restricted to the application of this principle.
  • the upper part of FIG. 1 is the front electrode layout; the lower part of the figure is the rear electrode layout.
  • the front electrode segments 1 and the rear electrode segments 2 have essentially the same geometrical arrangement so that to each front segment 1 there belongs a homologous rear segment 2. Both segments act together in such a way that simultaneous activation of the corresponding address leads produces a visual display of the segment.
  • Each character in FIG. 1 is composed of seven segments; a further display element 3-4 is provided between each character and serves as the decimal point in the display. Activation of all seven segments of a character produces the optical display of the Arabic numeral "8", the number "3" is indicated if only the three horizontal segments and the two vertical segments on the right side are activated, and activation of only the lastmentioned two segments produces the number "1".
  • the front segments 1 in corresponding positions on all digits, as well as all decimal points, are interconnected horizontally by address buses, so that all like elements are addressed in common.
  • all segments 2 of each digit and the right-adjacent decimal point are connected together and addressed by a vertical address bus.
  • These horizontal and vertical buses are equivalent to the rows and columns of a matrix at whose cross-points the segment pairs (front and rear segments) occur.
  • the multiplexing capacity of some displays is restricted.
  • the optical performance of a twisted nematic display is acceptable when three digits are multiplexed but becomes unsatisfactory if the time-sharing of address signals is extended to nine digits.
  • a nine-digit display could be realized by separately multiplexing each group of three adjacent digits.
  • the addressing electronics for such a three-digit group is shown schematically in FIG. 2.
  • BCD Binary-coded-decimal
  • 6 a multiplexer
  • 7 a BCD-to-seven-segment decoder
  • 8 a circuit which generates sequential strobe signals which select the digit multiplexed in synchronism with the selected column of the display matrix 9.
  • a single decoder-driver circuit 7 is sequentially switched by the multiplexer 6 among the digits of the input register.
  • FIG. 3 A deficiency in the arrangement of FIG. 1 is the complex photolithography needed to achieve the interconnection pattern. Furthermore, the constrictions in the leads where they have to pass between the display segments raise the electrical resistance of the leads, which leads to diminished display quality. A much simpler arrangement is known which eliminates these problems; it is shown in FIG. 3. Here three front electrode lines and three rear electrode lines are used to address each digit. The addressing circuitry for FIG. 3 is reproduced schematically in FIG. 4. A single standard decoder is no longer sufficient here; a practical alternative is the read-only-memory (ROM) 10 shown. The ROM 10 is shown with internal address decoding 11; 5, 8 and 9 have the same meanings as in FIG. 2.
  • ROM read-only-memory
  • FIG. 1 shows a prior art interconnection scheme for display elements.
  • FIG. 2 shows the addressing electronics for the three-digit group of FIG. 1.
  • FIG. 3 shows another prior art interconnection scheme for display elements.
  • FIG. 4 shows the addressing electronics for the three-digit group of FIG. 3.
  • FIG. 5 shows the interconnection scheme for display elements of the present invention.
  • the address leads in one matrix dimension extend over more than one character while in the other matrix dimension the addressing of each character is independent of the neighboring characters.
  • the row leads extend over all characters (rear segments) while each column lead interconnects front segments of a single character independent of any neighboring character.
  • the row leads likewise serve to interconnect rear segments on all the characters, but the column leads are not--or not always--restricted to interconnecting front segments which belong to a single character; this is evident for example in the interconnection of the third and sixth columns of FIG. 5. This has the immediate consequence that one column lead in the second character can be saved.
  • the proposed method gives a specific technique for reducing the lead count of a liquid crystal calculator display by 10% and discloses a general method for multiplexed addressing of multi-character displays with fewer leads.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
US05/769,322 1976-02-25 1977-02-16 Procedure for addressing of visual display devices Expired - Lifetime US4142182A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH228676A CH613549A5 (jp) 1976-02-25 1976-02-25
CH2286/76 1976-02-25

Publications (1)

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US4142182A true US4142182A (en) 1979-02-27

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US05/769,322 Expired - Lifetime US4142182A (en) 1976-02-25 1977-02-16 Procedure for addressing of visual display devices

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US (1) US4142182A (jp)
JP (1) JPS52102633A (jp)
CH (1) CH613549A5 (jp)
DE (1) DE2610607A1 (jp)
GB (1) GB1557841A (jp)
HK (1) HK63681A (jp)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4227192A (en) * 1977-05-31 1980-10-07 Citizen Watch Co., Ltd. Drive system for liquid crystal display device
US4291307A (en) * 1979-03-19 1981-09-22 International Telephone And Telegraph Corp. Planar alphanumeric display
US4300137A (en) * 1976-04-06 1981-11-10 Citizen Watch Company Limited Matrix driving method for electro-optical display device
US4309699A (en) * 1978-11-14 1982-01-05 Siemens Aktiengesellschaft Passive electro-optical display device
DE3150854A1 (de) * 1980-12-22 1982-12-23 Casio Computer Co., Ltd., Tokyo Fluessigkristall-anzeigeeinrichtung
US4380371A (en) * 1977-05-23 1983-04-19 Texas Instruments Incorporated Liquid crystal display device
US4385292A (en) * 1979-07-30 1983-05-24 Sharp Kabushiki Kaisha Segmented type liquid crystal display and driving method thereof
US4386350A (en) * 1979-06-26 1983-05-31 Nippon Electric Co., Ltd. Display apparatus
US4429304A (en) * 1978-09-06 1984-01-31 Seikosha Co., Ltd. Display driving device
US4443062A (en) * 1979-09-18 1984-04-17 Citizen Watch Company Limited Multi-layer display device with nonactive display element groups
US4545649A (en) * 1981-02-09 1985-10-08 Asulab S.A. - Eta 72 Electro-optical display device of point matrix type
GB2164777A (en) * 1984-09-19 1986-03-26 Telepane Inc Improvements in or relating to alphanumeric display modules
US4603495A (en) * 1984-09-19 1986-08-05 Stevens John K Alphanumeric display modules
EP0195764A2 (en) * 1985-03-22 1986-09-24 Husqvarna Aktiebolag Seam indicating arrangement in a sewing machine
US4682163A (en) * 1985-02-01 1987-07-21 Itt Corporation Method for writing characters on a liquid crystal display
US4764027A (en) * 1985-09-27 1988-08-16 Sharp Kabushiki Kaisha Display segment patterns of clinical thermometer
US4914730A (en) * 1982-04-02 1990-04-03 Seikosha Co., Ltd. Display device having plural groups of interconnected segment electrodes
US20080291127A1 (en) * 2007-05-24 2008-11-27 Yazaki Corporation Moving image display apparatus
US20110013128A1 (en) * 2009-07-20 2011-01-20 Avery Dennison Corporation Dynamic display with divided top electrode
US9646218B2 (en) * 2015-06-18 2017-05-09 Pfu Limited Image-processing apparatus, date identification apparatus, image-processing method, and computer program product

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5614293A (en) * 1979-07-13 1981-02-12 Sharp Kk Liquid crystal display
GB2118349B (en) * 1982-04-08 1985-11-20 Int Computers Ltd Liquid crystal character display

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3614771A (en) * 1969-09-18 1971-10-19 Hewlett Packard Co Display apparatus
US3760403A (en) * 1971-09-29 1973-09-18 Ibm Able strokes gas panel display having monogram type characters with matrix address
US3781863A (en) * 1970-12-23 1973-12-25 Suwa Seikosha Kk Digital display device
US3831166A (en) * 1973-03-16 1974-08-20 Rockwell International Corp Display character pattern
US4034368A (en) * 1975-01-27 1977-07-05 Nippon Kogaku K.K. Numerical display element

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5189348A (jp) * 1975-02-04 1976-08-05

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3614771A (en) * 1969-09-18 1971-10-19 Hewlett Packard Co Display apparatus
US3781863A (en) * 1970-12-23 1973-12-25 Suwa Seikosha Kk Digital display device
US3760403A (en) * 1971-09-29 1973-09-18 Ibm Able strokes gas panel display having monogram type characters with matrix address
US3831166A (en) * 1973-03-16 1974-08-20 Rockwell International Corp Display character pattern
US4034368A (en) * 1975-01-27 1977-07-05 Nippon Kogaku K.K. Numerical display element

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4300137A (en) * 1976-04-06 1981-11-10 Citizen Watch Company Limited Matrix driving method for electro-optical display device
US4380371A (en) * 1977-05-23 1983-04-19 Texas Instruments Incorporated Liquid crystal display device
US4227192A (en) * 1977-05-31 1980-10-07 Citizen Watch Co., Ltd. Drive system for liquid crystal display device
US4429304A (en) * 1978-09-06 1984-01-31 Seikosha Co., Ltd. Display driving device
US4309699A (en) * 1978-11-14 1982-01-05 Siemens Aktiengesellschaft Passive electro-optical display device
US4291307A (en) * 1979-03-19 1981-09-22 International Telephone And Telegraph Corp. Planar alphanumeric display
US4386350A (en) * 1979-06-26 1983-05-31 Nippon Electric Co., Ltd. Display apparatus
US4385292A (en) * 1979-07-30 1983-05-24 Sharp Kabushiki Kaisha Segmented type liquid crystal display and driving method thereof
US4486748A (en) * 1979-07-30 1984-12-04 Sharp Kabushiki Kaisha Segmented type liquid crystal display and driving method thereof
US4443062A (en) * 1979-09-18 1984-04-17 Citizen Watch Company Limited Multi-layer display device with nonactive display element groups
DE3150854A1 (de) * 1980-12-22 1982-12-23 Casio Computer Co., Ltd., Tokyo Fluessigkristall-anzeigeeinrichtung
US4545649A (en) * 1981-02-09 1985-10-08 Asulab S.A. - Eta 72 Electro-optical display device of point matrix type
US4914730A (en) * 1982-04-02 1990-04-03 Seikosha Co., Ltd. Display device having plural groups of interconnected segment electrodes
US4603495A (en) * 1984-09-19 1986-08-05 Stevens John K Alphanumeric display modules
GB2164777A (en) * 1984-09-19 1986-03-26 Telepane Inc Improvements in or relating to alphanumeric display modules
US4682163A (en) * 1985-02-01 1987-07-21 Itt Corporation Method for writing characters on a liquid crystal display
EP0195764A2 (en) * 1985-03-22 1986-09-24 Husqvarna Aktiebolag Seam indicating arrangement in a sewing machine
EP0195764A3 (en) * 1985-03-22 1989-05-10 Husqvarna Aktiebolag Seam indicating arrangement in a sewing machine
US4764027A (en) * 1985-09-27 1988-08-16 Sharp Kabushiki Kaisha Display segment patterns of clinical thermometer
US20080291127A1 (en) * 2007-05-24 2008-11-27 Yazaki Corporation Moving image display apparatus
US8847856B2 (en) * 2007-05-24 2014-09-30 Yazaki Corporation Moving image display apparatus
US20140333511A1 (en) * 2007-05-24 2014-11-13 Yazaki Corporation Moving image display apparatus
US9601045B2 (en) * 2007-05-24 2017-03-21 Yazaki Corporation Moving image display apparatus
US10008147B2 (en) 2007-05-24 2018-06-26 Yazaki Corporation Moving image display apparatus
US20110013128A1 (en) * 2009-07-20 2011-01-20 Avery Dennison Corporation Dynamic display with divided top electrode
US9646218B2 (en) * 2015-06-18 2017-05-09 Pfu Limited Image-processing apparatus, date identification apparatus, image-processing method, and computer program product

Also Published As

Publication number Publication date
CH613549A5 (jp) 1979-09-28
DE2610607A1 (de) 1977-09-01
GB1557841A (en) 1979-12-12
JPS52102633A (en) 1977-08-29
HK63681A (en) 1981-12-31

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